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Punnett Squares And Genetics
Test Description: Punnett squares and genetics for 7th grade
Instructions: Answer all questions to get your test result.
1) Which is an example of a phenotype
A
ff
B
freckles
C
FF
D
Ff
2) Which is an example of a genotype?
A
hitch hiker thumb
B
RR
C
dimples
D
red hair
3) If you cross a heterozygous tall Tt with a homozygous tall TT, what % chance do ou have for a child that is short tt
A
25%
B
0%
C
50%
D
100%
4) If you cross to heterozygous talls what chance do you have of offspring that are also heterozygous hybrids?
A
0%
B
75%
C
50%
D
25%
5) What is another name for homozygous?
A
hybrid
B
purebred
C
heterozygous
D
phenotype
6) What is another name for hybrid?
A
purebred
B
homozygous
C
phenotype
D
heterozygous
7) If you cross to short pea plants tt . What chance do they have of having short offspring?
A
75%
B
100%
C
0%
D
25%
8) Which is a hybrid genotype?
A
YY
B
TT
C
tt
D
Tt
9) Which is a purebred genotype?
A
Rr
B
Tt
C
TT
D
Ff
10) Which is a homozygous dominant genotype?
A
Tt
B
yy
C
tt
D
TT
11) Which is a purebred recessive genotype?
A
Tt
B
YY
C
TT
D
tt
12) What tool do we use to predict genetic crosses?
A
mendel's magic shovel
B
pedigree charts
C
punnett squares
D
watson and cricks staircase
13) If yellow (Y) is dominant over blue in sponges which genotype would represent blue sponges?
A
Bb
B
YY
C
Yy
D
yy
14) Can two hybrid parents have purebred offspring?
A
I don't know
B
no
C
????
D
yes
15) Can a homozygous dominant parent and a homozygous recessive parent have a purebred offspring?
A
yes
B
I don't know
C
???
D
no
16) What do we call the different forms of a gene?
A
genes
B
genotypes
C
alleles
D
phenotypes
17) Who was the father of genetics?
A
James Watson
B
Louis Pasteur
C
Reginald Punnett
D
Gregor Mendel
18) Brown hair is an example of a ________
A
genotype
B
osmosis
C
punnett square
D
phenotype
*select an answer for all questions
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